{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["Chemical", "Disease"], "input": "While severe hypokalemia may cause muscle weakness , severe hypomagnesemia is associated with muscle spasms and tetany which cannot be corrected by potassium and calcium supplementation alone ( 1 , 2 ) ."}
{"Chemical": ["potassium", "calcium"], "Disease": ["hypokalemia", "muscle weakness", "hypomagnesemia", "muscle spasms", "tetany"]}